Art of preserving coffee



March 28, 1 4 J. BRENZINGER ART OF PRESERV'ING COFFEE Filed April 21, 1942' III 7 ///A r r 7 1 jig- Z I INVENTOR.

BY I W KITTOIPNEY Julius. flrenzz'zgger UNITED STATES PATENT OFFICE ART OF PRESEBVING COFFEE Julius Brenzinger, Fairiield, Conn., assignor to 4 The Max Ams Machine Company, Bridgeport,

Conn., a corporation of Connecticut Application April 21, 1942, Serial No. 439,844

- This invention relates to the art of the desirable qualities of ground coffee.

preserving It has been, for a long time, the custom to pack ground coffee in containers and to vacuumcoflee to a pressure of the order of forty to eighty tons to the square inch, the ground coffee is converted into a cake or compacted mass 8 that z Claims. (01. 99-152) is inherently capable of sustaining itself against collapse and having a reluctance to expand when the surface thereof is-subjected to the action of air at room, or lower, temperature. No binder ize the packed containers bei'ore sealing them. So 5 material "is used in compacting or compressing long. as contpmrs of proper material m b the ground coffee and it should be pointed out obtained and the containers adequately sealed, that the oper i n scri d goes beyond the such method has been fairly, though not entirely, tempt to mer ly remove the greater portion of successful. But now the art is confronted with the air between the particles in that it seemsto a condition in which it may not be possible to render said particles inert. as it were, 8 1 use substantially air-tight containers an the obtion in w i at m temperature. pr y fleet or this invention is to overcome this difno exp nsion of the particles of the cake takes fleult b so tr ati u m t t preplace and it is therefore possible to pack a pluvention of exposure to air is nolonger so impormlity Said cakes in a Container of a tant as formerly. size substantially devoid of space perm tting ex- In the accompanying drawin th invention pansion or the cakes. The result is that, even is di l i concrete and preferred form in if such container 9 and its cover ID are not made hieh of very substantial material and are not per- 1; 1 1 vertical sectional View through a fectly sealed, there appears to be no tendency to mold having amold chamber with which is assoso disrupt h container fir t0 separate h cover elated t pistorm the parts being shown t the from the container, even when said cover is not be inning of the operation; securely fastened as by double seaming and soi- Fls. 2 1s a view similar to F g. 1, but showing e ns to t e c nt n r- 1 esi ed. each cake t i d coflee compressed t a cake; may be enclosed in a suitable envelope as H rise is a view similar to Figs. 1 and 2, but having its e sealed and this n e will showing the parts in the position they occupy preferably be e of e flexible h opl ic after the cake has been produced and in the material such as Egenemted 0911111059 material t f being jected from the mold m which, by the momentary application of heat, can F1 4 is a perspectivezview of a cake enclosed. be made to seal the' cake quite effectively. The and sealed in an envelope of thermoplastic matecake contained in envelope H may be 8015 P- 1 1; and arately or a number of such cakes in said enmg. a vertical sectional flew through a velopes may be placed in said container 9, in container in which a number of the cakes are the manner Previously described- 'placed. It has been found that coffee, treated in the Y The "mass of cofle l, ground finene of a manner above described, will, at room temperat customaril employed in making drip g. ture or less than room temperature, keep its defee, is placed in a mold 2, having a mold chamsimble qualities practically indefinitely. ber 4 indicates a piston constituting the bot- The mold and mechanism, comeresslnsthe tom of the mold chamber and constitutingalso herein disclosed s t claimed n th an electing member for thecompressed cake to 40 present pplication, but forms the subject matbe produced 5 indicates a second piston Oppoter of another application filed June 2, 1943, Ber.

site to the first one to compress the mass of 489,336- 7 ground cofl'ee against the first piston 4. Suitmr v able means are provided, here indicated by The method of pr se in the desirable quaiplunger Q, flymove t second piston t ities of ground coflee which consists-in: subjectmold chamber toward the first piston I while the ing the ground coflee to pressure of the order of latter is stationary and in its lowermost posiforty t hty tons to the square in h to thereby tion and to thereafter move said second piston compact the mass into a; coherent cake inherentout of the mold chamber. Suitable means, here 1y pa l of s i ing itself again t -9 indicated by plunger I, are provided to move the to when pressure is removed, and the particles of first piston I to eject the compressed cake ii p which are inert and have a reluctance to e'ipand out of the mold chamber and thereafter to move when said cake is subjected to the action of air said first piston I back into the mold chamber at room, or lower, temperature. to receive another charge at ground coflee. 2. In the art of preserving coffee, that step I have found that. by subjecting the ground which consists in subjecting ground coffee to pressureof the order of forty to eight tons to the square inch.

- JULIUS BRENZINGER. 

